text: /*
   * libmad - MPEG audio decoder library
   * Copyright (C) 2000-2004 Underbit Technologies, Inc.
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   *
   * $Id: decoder.h 8581 2004-02-18 04:36:30Z gmaynard $
   */
  
  # ifndef LIBMAD_DECODER_H
  # define LIBMAD_DECODER_H
  
  # include "stream.h"
  # include "frame.h"
  # include "synth.h"
  
  enum mad_decoder_mode {
    MAD_DECODER_MODE_SYNC  = 0,
    MAD_DECODER_MODE_ASYNC
  };
  
  enum mad_flow {
    MAD_FLOW_CONTINUE = 0x0000,	/* continue normally */
    MAD_FLOW_STOP     = 0x0010,	/* stop decoding normally */
    MAD_FLOW_BREAK    = 0x0011,	/* stop decoding and signal an error */
    MAD_FLOW_IGNORE   = 0x0020	/* ignore the current frame */
  };
  
  struct mad_decoder {
    enum mad_decoder_mode mode;
  
    int options;
  
    struct {
      long pid;
      int in;
      int out;
    } async;
  
    struct {
      struct mad_stream stream;
      struct mad_frame frame;
      struct mad_synth synth;
    } *sync;
  
    void *cb_data;
  
    enum mad_flow (*input_func)(void *, struct mad_stream *);
    enum mad_flow (*header_func)(void *, struct mad_header const *);
    enum mad_flow (*filter_func)(void *,
  			       struct mad_stream const *, struct mad_frame *);
    enum mad_flow (*output_func)(void *,
  			       struct mad_header const *, struct mad_pcm *);
    enum mad_flow (*error_func)(void *, struct mad_stream *, struct mad_frame *);
    enum mad_flow (*message_func)(void *, void *, unsigned int *);
  };
  
  void mad_decoder_init(struct mad_decoder *, void *,
  		      enum mad_flow (*)(void *, struct mad_stream *),
  		      enum mad_flow (*)(void *, struct mad_header const *),
  		      enum mad_flow (*)(void *,
  					struct mad_stream const *,
  					struct mad_frame *),
  		      enum mad_flow (*)(void *,
  					struct mad_header const *,
  					struct mad_pcm *),
  		      enum mad_flow (*)(void *,
  					struct mad_stream *,
  					struct mad_frame *),
  		      enum mad_flow (*)(void *, void *, unsigned int *));
  int mad_decoder_finish(struct mad_decoder *);
  
  # define mad_decoder_options(decoder, opts)  \
      ((void) ((decoder)->options = (opts)))
  
  int mad_decoder_run(struct mad_decoder *, enum mad_decoder_mode);
  int mad_decoder_message(struct mad_decoder *, void *, unsigned int *);
  
  # endif
  